code: def test_use_default_values(self):
      # let's first save a config that should be in the form
      #    a=2,
      #    b=5,
      #    c=(2, 5),
      #    d="for diffusion",
      #    e=[1, 3],
  
      config = SampleObject()
  
      config_dict = {
          k: v
          for k, v in config.config.items()
          if not k.startswith("_")
      }
  
      # make sure that default config has all keys in `_use_default_values`
      assert set(config_dict.keys()) == set(
          config.config._use_default_values
      )
  
      with tempfile.TemporaryDirectory() as tmpdirname:
          config.save_config(tmpdirname)
  
          # now loading it with SampleObject2 should put f into `_use_default_values`
          config = SampleObject2.from_config(tmpdirname)
  
          assert "f" in config._use_default_values
          assert config.f == [1, 3]
  
      # now loading the config, should **NOT** use [1, 3] for `f`, but the default [1, 4] value
      # **BECAUSE** it is part of `config._use_default_values`
      new_config = SampleObject4.from_config(config.config)
      assert new_config.f == [5, 4]
  
      config.config._use_default_values.pop()
      new_config_2 = SampleObject4.from_config(config.config)
      assert new_config_2.f == [1, 3]
  
      # Nevertheless "e" should still be correctly loaded to [1, 3] from SampleObject2 instead of defaulting to [1, 5]
      assert new_config_2.e == [1, 3]
  
imports: import tempfile
  import unittest
  from diffusers import DDIMScheduler, DDPMScheduler, DPMSolverMultistepScheduler, EulerAncestralDiscreteScheduler, EulerDiscreteScheduler, PNDMScheduler, logging
  from diffusers.configuration_utils import ConfigMixin, register_to_config
  from diffusers.utils.testing_utils import CaptureLogger
label_desc: Use image node_id 10 for calling the ConfigTester obj's underlying member method code with example usage: obj.test_use_default_values() without return types